package com.netty.badtcptime;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/**
 * Package Name:com.my.time
 * Description: TCP粘包场景模拟
 * Date:2016/8/23 17:02
 * Copyright (c) 2016, zhongmu@suneee.com All Rights Reserved.
 */
public class TimeServer {

    public void bind(int port){
        //配置服务端的NIO线程组
        EventLoopGroup  bossGroup = new NioEventLoopGroup();
        EventLoopGroup  workerGroup = new NioEventLoopGroup();
        try{
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup,workerGroup)
             .channel(NioServerSocketChannel.class)
             .option(ChannelOption.SO_BACKLOG,1024)
             .childHandler(new ChildChannelHandler());

            // 绑定端口，同步等待成功
            ChannelFuture f = b.bind(port).sync();

            //等待服务器监听端口关闭
            f.channel().closeFuture().sync();
        }catch (Exception e){

        }finally {
            //优雅退出，释放线程池资源
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }

    private class ChildChannelHandler extends ChannelInitializer<SocketChannel> {

        @Override
        protected void initChannel(SocketChannel socketChannel) throws Exception {
            socketChannel.pipeline().addLast(new TimeServerHandler());
        }
    }


    public static void main(String[] args) throws Exception {
        int port = 8080;
        System.out.println("服务端开始...");
        try {
            if(args!=null && args.length>0){
                port = Integer.valueOf(args[0]);
            }
        } catch (NumberFormatException e) {
            e.printStackTrace();
        }
        new TimeServer().bind(port);
    }
}
